Molding-machine.



-G. HERMAN,

MOLDING MACHINE. APPLICATION FILED JULY 2, 1910.-

Patented A p-1s, 1911.

(Qid

.NVENTOR V TE s'rans CHARLES HERMAN,

MATIC MACHINE PENNSYLVANIA.

OF ZELIENOPLE, PENNSYLVANIA, ASSIGNOR T HERMAN PNEU- COMPANY, OF PITTSBURG, PENNSYLVANIA, A CORPORATION OF MOLDING-MACHINE.

Specification of Letters Patent.

Patented Apr. 18, 1911.

Application filed July 2, 1910. Serial N 0. 570,203.

To all whom it may concern:

Be it known that I, CHARLES HERMAN, a resident of Zelienople, in the county of Butler and State of Pennsylvania, have invented a new and useful Improvement in Moldin -Machines; and I do hereby declare the fol owing to be a full, clear, and exact description thereof.

My invention relates to molding machines, and has special reference to what are known as jarring machines for forming sand molds, such as is shown in United States Letters Patent No. 908,002, granted to myself and others on December 29, 1908.

The object of my invention is to provide such a molding machine in which the pattern plate will be properly guided in its movements, and at the same time will enable such plate to be cushioned around the same during its striking in the jarring operation.

My invention consists, generally stated, in the novel arrangement, construction and combination of parts, as hereinafter more specifically set forth and described and particularly pointed out in the claims.

To enable others skilled in the art to which my invention appertains to construct and use my improved molding machine, I will describe the same more fully, referring to the accompanying drawing, in which- Figure 1 is a plan View of my improved molding machine and showing some of the parts in section. of the same, showing some of the parts in section. Figs. 3 and 1 are enlarged detail sectional views of a portion of the same.

1 Like symbols of reference herein indicate like parts in each of the figures of the drawmg.

As illustrated in the drawing, 1 represents the base of the machine, which has the casing 2 of rectangular shape extending up from the same, and within said casing and formed as part of the same is. the cylinder 3. This cylinder 3 is positioned vertically within the casing 2 and has a series of vertical wings 4 connecting the outer sides of the same with the inner sides of said casing, while a cross-wall 5 is formed in the lower end of said cylinder and above the same is an openlng 6 for the connectlon of Fig. 2 is a side elevation pins 16, as

a supply pipe (not shown) to supply fluid,

such as air, into said cylinder to operate the same. Within the cylinder 3 and above the cross-wall 5 therein is the plunger 7 which is connected at its upper end to a table or pattern plate 9, and such plate extends over the top of the casing 2 and is of rectangular shape in an inverted cup-shaped form, so that its outer annular flange 10 extending down from the outer edge of the same will fit around the upper end of said casing when the plate is in its lowered position. EX- tending down from the under face of the plate 9 is the inner annular flange 11, which is connected to the plunger 7 by a series of ribs or wings 12, and at each corner of the same and intermediate of said corners is a post or enlargement 13 extending around said flange from the bottom of the plate 9 to a point below said flange. The corner enlargements 13 are provided with two fiattened faces 14 on the side of the same atright angles to each other and the intermediate enlargements are provided with a single similar flattened face on one side of the same, which faces are adapted to engage with removable bearing plates or slides 15 secured to the inner face of the casing 2 and at the upper end of the same by the driven pins 16. These pins 16 are provided with a contracted inner portion 17 and with an enlarged outerportion 18, so that they can be inserted exteriorly of the casing 2 through holes 19 in said casing and through holes 20 in said slides registering with said holes 19, and the portion 17 on said pins will fit within said holes 20 and the portion 18 thereon will fit in said holes 19. The inner ends of the holes 20 are countersunk beyond the ends of the portions 17 on the at 21, and the engaging face of the slides 15 for the faces let are provided with cross-recesses 22 therein having a flared upper end, as at 22, so that a suitable lubricant for such slides can be fed to said recesses and countersinks through a hole 23 extending through the plate 9 and closed by a suitable screw 24 fitting within the same.

Below each of the enlargements 13 is jarring post or bracket 25 which is formed as part of and extends inward from the inner pleted mold, and then ready for its removal face of the casing 2, and each of said posts from the plate 9 1n the usual manner, after is provided with an angular rib 26 connectwhich another sand filled flask can be placed ing the bottom of the same with the inner on said plate and over the pattern thereon and the jarring operations repeated.

side of said casing. Within the upper face g It will thus be seen that my improved 10f the posts 25 is a seat 27 for the reception I I of a resilient jarring block 28, preferably molding machine is cheap, simple and efliformed of rubber, or other suitable flexible cient in its construction and operation, and will permit the pattern carrying plate to be material, and fitting within said seat and 10 against each of the upper'faces of said block completely and properly guided in itsmoveis a wearing block plate 29, which extends ments in the jarring operation, whlle the above its sea-t and is adapted to engage with slides or platesused as guides are capable of the post 13 in line with the same in the jaradjustment and replacing in case of then ring operation. becoming worn from usage, ,or from any 15 The use and operation of my improved other cause. The placing of the guides enmolding machine is as follows-The pattirely around the pattern-plate and with the tern 30 is secured to the top of the plate jarring blocks beneath the same will enable 9 in the usual manner, and the sand filled the jarring to be distributed evenly over the flask 31 rests upon the top of said plate and entire area of the plate and formthe sand around such pattern in the usual manner, in the flask to be packed with a uniform so that the machine is then ready for the solidity throughout the same andthereby jarring operation, which is accomplished by form better molds. By the use of the jarallowing the compressed air or other fluid ring blocks in such position for engagement to enter the cylinder 3 from a source of supof the pattern-plate therewith, such plate 1s ply and suitable valve mechanism (not insured of a proper support and even for shown) through the pipe attached to the jarring throughout its area, while such opening 6 in said cylinder, and thereby acts blocks being in line with the guiding means to raise the plunger 7 within said cylinder for the plate will enable the posts for engagand with it the plate 9 and pattern and 30 flask 31 thereon. As the plate 9 and flask ing with such blocks to be in proper almement for striking the blocks in the jarring 31 are thus raised, the air within the cyl inder 3 is permitted to pass out of the same operation, and so insure a better and more compact jarring of the sand in the mold in through the opening and by means of such valve mechanism, so that it can escape into the jarring operation.

Various modifications and changes in the 35 the open air through said mechanism in the design and operation of the various parts usual manner. As the air is thus exhausted of my improved molding machine may be from the cylinder 3 the plunger 7 therein resorted to, without departing from the V will be lowered and thus permit the plate 9 with the flask 31 thereon to be dropped, so that the lower ends of the posts 13 on the bottom of said plate will engage with the blocks 29 on the resilient jarring blocks 28 in the posts 25 to jar the sand within said flask and around the pattern 30 on said plate. When the plate 9 and flask 31 are thus lowered with the plunger 7, the Valve mechanism will permit the air to again enter the cylinder 3 through the opening 6 therein, for again raising said plunger, plate, pattern and flask in another arring operation, as hereinbefore described, and during both these movements of raising and lowering the plate and flask, such plate is properly guided by the faces 14 on the plate posts 13 engaging with the slides 15 on the casing 2. These operations of raising and lowering the plate 9 and flask 31 for the purpose of packing the sand in said flask around the pattern 30 on said plate are'preferably automatically performed and continued as long as the operating fluid is allowed to flow into the cylinder 3, and upon the closing of the valve controlling the fluid to said cylinder, the plate and flask will then be in their lowered 5 positions, with the latter containing the comits advantages.

What I claim as my invention and desire to secure by Letters Patent is 1. Ina machine for jarring sand molds,

means for raising and lowering said plate, and a series of devices extending around the corners of said plate and intermediate of said corners for guiding the same in its rising and lowering movements.

the combination of a table or pattern-plate, a casing around the plate, means for raising and lowering said plate, and a series of detending around the corners of the same and intermediate of said corners for guiding the plate in its rising and lowering movements.

3. In a molding machine, the combination of a table or pattern-plate, meansfor raising and lowering said plate, devices extending continuously around said plate for guiding the same in its rising and lowering movements, and resilient jarring blocks bearound and engaging with said plate for cushioning the same in the jarring action.

spirit of the invention or sacrificing any ofthe combination of a table or pattern-plate,

2. In a machine for jarring sand molds,

vices between. said plate and casing and ex- I low said devices and extending continuously.

4. In a molding machine, the combination of a table or pattern-plate, means for raising and lowering said plate, devices extending continuously around said plate for guiding the same in its rising and lowering movements, resilient jarring blocks below said devices and extending continuously around said plate to cushion the jarring action, and

CHAS. HERMAN.

jarring blocks for Witnesses:

W. A. SWAIN, Z. MCMICHAEL.

M Copies of this patent may be obtained for five cents each, by addressing the Washington, D. C.

Commissioner of Patents, 

